\begin{table}[tbhp] \centering {\begin{tabular}{l*{5}{c}}
\hline
                    &\multicolumn{1}{c}{2002}&\multicolumn{1}{c}{2003}&\multicolumn{1}{c}{2004}&\multicolumn{1}{c}{2005}&\multicolumn{1}{c}{2006}\\
\hline
emwch               &       2.990         &       2.333         &      -3.480\sym{*}  &       2.610         &      -9.588         \\
                    &       2.352         &       2.044         &       1.993         &       2.399         &       6.124         \\
Constant            &       164.3\sym{***}&       163.7\sym{***}&       167.8\sym{***}&       165.1\sym{***}&       177.8\sym{***}\\
                    &       1.656         &       1.497         &       1.629         &       2.135         &       6.036         \\
 \hline
N                   &       31657         &       41654         &       43808         &       44027         &       38910         \\
\hline
\end{tabular} } \end{table} 
